/*
 * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

package io.sermant.core.service.xds.entity;

import io.sermant.core.service.xds.entity.match.MatchStrategy;

import java.util.Map;

/**
 * xDS HeaderMatcher
 *
 * @author daizhenyu
 * @since 2024-08-15
 **/
public class XdsHeaderMatcher {
    private final String name;

    private final MatchStrategy matchStrategy;

    /**
     * parameterized constructor
     *
     * @param name header name
     * @param matchStrategy match strategy
     */
    public XdsHeaderMatcher(String name, MatchStrategy matchStrategy) {
        this.name = name;
        this.matchStrategy = matchStrategy;
    }

    /**
     * the request header matches the route configuration header or not.
     *
     * @param headers request headers
     * @return isMatch
     */
    public boolean isMatch(Map<String, String> headers) {
        if (headers.containsKey(name)) {
            return matchStrategy.isMatch(headers.get(name));
        }
        return false;
    }
}
